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## Help! Year 8 Maths question makes no sense to anyone in our house!

(39 Posts)
TaudrieTattoo Sun 22-Sep-13 21:49:22

DP and I have four degrees between us, but this is impossible.

Anyone good at Maths?

The question is: Multiplying a number by three and adding four is equal to subtracting the number from 28. What is the number? Let the number be x.

You have to express it as an equation then solve it.

I got as far as 28-x = 3x x 4 but then ground to a halt.

It's mathematical bollocks to me.

Can anyone help my poor DS?

irregularegular Tue 24-Sep-13 10:53:49

Nicename - you are one of the people who could easily find the answer so i don't know why you are convinced I am saying you are stupid???

nicename Tue 24-Sep-13 10:46:20

I asked my 9 year old and he managed it in about 2 minutes.

I'm not stupid - dad taught maths at uni - I just never found maths all that interesting. I do calculations in my head (I 'see' the answers) and can write out all the workings out if I want/need to. So I won't be asking London uni for my fees back just now.

diddl Tue 24-Sep-13 09:13:40

I'm with irregular, tbh-that if you know the basics of X for the unknown & how to move from one side of the equals to the other, it's an easy one.

The original question spells it out!.

OP-I'm thinking that you couldn't do it because you got the original equation wrong.

irregularegular Tue 24-Sep-13 08:59:36

I didn't say anyone was stupid nicename. But it's not a great indicator of the quality of school maths teaching - or even university teaching in your case. Clearly whoever said this stuff was largely being learned by rote was right - and that's truly a waste of everyone's time.

SwedishEdith Mon 23-Sep-13 20:22:35

* I thought this kind of algebra was a 'once seen - and understood - never really forgotten' kind of skill*

Clearly not

nicename Mon 23-Sep-13 17:12:47

Oh do get off your high horse! I have 2.5 degrees (stats and economics being big parts of two of them) and 2 postgrads and have a crap grasp of maths (not great since I have super-maths brains in the family).

Not being good/confident at maths doesn't make you stupid!

irregularegular Mon 23-Sep-13 17:06:23

Oh my. I'm really shocked by how many educated people think this is hard.
It's rather worrying if someone with A-level maths can't do this easily. I thought this kind of algebra was a 'once seen - and understood - never really forgotten' kind of skill. Otherwise there really isn't much point.

I'm not shocked that it is difficult for a Yr 8 who is new to this stuff - but I'm shocked by the rest of the thread.

nicename Mon 23-Sep-13 16:52:11

6 and I am really really shit at maths. I have no idea how I know it is 6 - it just flew into my head when I read the question. Do other people just see numbers like shapes?

Maybe I'm just a maths genius... (the school did think I was when I was small, but I showed 'em dammit!).

Mon 23-Sep-13 16:50:19

I did my maths A-Level three years ago and I've evidently forgotten it all. I'm in awe at all the answers on here

Mon 23-Sep-13 16:48:38

There is a really good App called Dragonbox.that teaches algebra without numbers - my dd who is dyscalculic has fun with it as to her it is just puzzles .

Mon 23-Sep-13 16:46:07

I could do it in my head - did 'O' level in '72, but then I used to do proof by induction to relax in bed before going to sleep if I didn't have a book to read.

TaudrieTattoo Mon 23-Sep-13 16:41:34

Thanks all. I did write a note to the teacher requesting he explain to ds again - I just wanted to know the answer so dp and I could sleep!

We'd been at it an hour

ThisIsBULLSHIT Sun 22-Sep-13 23:06:27

Whoooaaahhhh. That is gobbledegook.... Thank goodness I teach teeny ones, that just doesn't fit inside my brain.

OP I salute your yr 8dc. (And all the MN who can do this so easily)

SwedishEdith Sun 22-Sep-13 23:02:04

I think, for some, algebra is learned once for exams and then simply deleted from the mind. I can follow the explanations easily enough but wouldn't have a clue how to start it myself.

ClayDavis Sun 22-Sep-13 22:56:22

12-13, Happy. Obviously, if you don't know how to do it, it's hard, but I agree it is among the easier algebra.

HappyHugs Sun 22-Sep-13 22:51:34

I honestly dont think that's particularly difficult. I did my gcse maths in 1991 and remembered how to approach it from then; and that would've been among the easier algebra we tackled. What age is year 8? All different in N.Ireland...

soontobeburns Sun 22-Sep-13 22:31:44

What??? I just did my maths gcse 5 years ago and I passed. This makes no sense!

Fucking x as long as you can do mental maths this isnt needed.

That makes no sense to me yet aptitude questions I pass with flying colours.

Sun 22-Sep-13 22:25:28

It's just your basic equation with X on both sides.

There's 2 elements that are being tested.

1) Can he make an expression using X?

e.g. I am X years old. Sue is 5 years older. Express Sue's age in terms of X.

2) Can he rearrange equations to find X?

Simple ones: 5X + 2 = 32

Harder ones: 5X + 2 = 32 - X

It might be useful to see which ones he finds hard.

SwedishEdith Sun 22-Sep-13 22:17:16

@ the breezy That isn't hard is it.

notthefirstagainstthewall Sun 22-Sep-13 22:08:37

And there was a reply in just 3 minutes...[awe emoticon]

notthefirstagainstthewall Sun 22-Sep-13 22:06:45

OMG that's Year 8 not A'level ?!!!

It's not going to be pretty in our house in 2 years time...

RoonilWazlibWuvsHermyown Sun 22-Sep-13 22:01:07

ClayDavis Sun 22-Sep-13 22:00:50

If he really doesn't understand it, it would be better to hand it in undone or having done as much as he can rather than done by some one else.

UnicornsNotRiddenByGrownUps Sun 22-Sep-13 22:00:34

This thread is like watching black magic......

TaudrieTattoo Sun 22-Sep-13 21:57:49

Thank you!

Our brains just don't do numbers!

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